O2 Sensor Bungs

[Hydrargyrum]

I am in the process of putting my car back together. The RaceBits headers do not have the bottom O2 sensor bungs. I was wondering where I can buy some SS bungs? In addition, what would be the size/thread I need? I don't want to assume that all O2 sensors are the same, so I was wondering what the specs would have to be...

Thanks!

[cjmahone66]

i would think that many muffler shops should have some of those kicking around. bring them the sensor and i'm sure they can tell you what size bung to use.

[jimbbski]

the most common thread i've seen for O2 sensors is 18 X 1.5 MM. 18 MM diameter and 1.5 threads per MM.

[amc49]

You can make those up by cutting off the end of a proper sized non-fouler for spark plugs. I've done it.

[compudude86]

I have heard of and seen online people using metric hex nuts as bungs, not sure if this is a good idea or not

[Chas]

I have heard of and seen online people using metric hex nuts as bungs, not sure if this is a good idea or not

I've seen this done also, quite a few times. The only difference between a nut and a bung, is the flat vs. round outside. If you pay a little more you can find bungs that are notched that follow the contour of the exhaust pipe, but with someone who can weld properly, the notching doesn't make a difference.